Method of and mechanism for perforating plastic material



y r A. H. TYSON METHOD OF AND MECHANISM FOR PERFORATING PLASTIC MATERIAL 3 Sheets-Sheet 1 Filed Aug. 15, 1922 y A. H. TYSON METHOD OF AND MECHANISM FOR PERFORATING PLASTIC MATERIAL I Filed Aug. 15, 1922 3 Sheets-Sheet 2 1.628 342 May 10, 1927. A. H. TYSON METHOD OF AND MECHANISM FOR PERFORATING PLASTIC MATERIAL Filed Ana. is, 1922 s Sheets-Sheet s Patented May 10, 1927.

A ANDREW 'I-I. TYSON, OF WASHINGTON, DISTRICT OF COLUMBIA.

METHOD OF AND MECHANISM FOR PERFORATING PLASTIC MATERIAL.

Application filed August 15, 1922. seriaino. 582,000.

illy invention relates to an improvement in method of, and mechanism for, pertorating plastic material.

The primary feature of this invention is the conccalniient and protection provided a piercing-pin just prior to its piercing a hole through hot, semi-plastic molded material while still held in the mold.

Another object is to provide means for Withdrawing the piercing device, immediatel alter the hole is pierced, from the hot molten mass.

Another object is to provide means for regulating automatically the feeding oi the hole-forming device.

Still another object is to provide protection for the hole forming device before. or preliminary to, the piercing operation of the molded article. I

Further objects will be apparent as the details are'more fully described.

With these severalobjects in view, this invention consists in means for forming a small hole in glass while held in the mold and still in a hot molten state.

The invention forming a minute hole in an article made from vitreous material immediately following its "formation, and while held between the imn'iediatelfy withdrawingthe hole forming pin before the becomes set or hard.

The invention further consists ,in meeha nifsni tor alternatel feedin and w1tl'1dra'w, mg the pm a predetermined dlstan ce at- The invention includes a clutch releasingmechamsm. in connection with a: stop against which the wire which forms the pin is lowered to regulate itslength and position, as

wear on the endtaliesplaceincludes mechanism tor mold and plunger ina semi-molten state, and

mass has been largely spent, following This invention further includes aplunger, a pin movably concealed in the plunger, and means for discharging a jet of cool air within the plunger in contact with the pin. to keep down the temperature of the latter.

Int-he accompanying drawings F 1; is a. view in side elevation;

Fig; 2 is a fragmentary view of the base or foot of the frame;

' Fig. 3' is an enlarged view-0f a portion of the uiacl-iine showing the gripping cam Fig. 4 is an enlarged section through the mold'and the lower end of the plunger;

F 5 is an enlarged fragmentary View of the portion shown in Fig. 3, showing a change in the position "of parts;

Fi g. 6 is a view of the same taken at rightangles; i

Fig. 7 is an. enlarged view corresponding to Fig. 3, but in section; I

Fig. 8 is an enlarged horizontal section on line 8 8 of Fig.1;

Fig. 9 is a horizontal sectional View on line 99 of" Fig. 7; i 1

V Fig. 10 is an enlarged horizontal section on line lO -1lO of Fig. l.

v The numeral 1 represents a vertical column, 2, a base, and 3. a touravay elbow joining the column and base and forming a means upon which the machine rests and is supported. I h

At intervals, the horizontal plates 4 and 5 aresecured to the vertical column, and extend laterally in the same direction, and form apart of the frame. The numeral 6 indicates the mold-support, and-7 is the mold; and 8, is the article formed in the moldE-in this instance a glass fruit jar cap. The numeral 9' indicates a hollow plunger between which and the'mold 'Z the article 8 is formed.

The shape of the mold and plunger is such that the glass is purposely madevery' thin at the center of the cap, as. shown in Figs. 1 and 4, preparatory to piercing the hole through the cap at this point.

The end of the wire is Withheld and is not exposed until after the article is molded, and the intensity of the heat of the molten whieln howoren the wire is tod down through the plunger, and its lower end is caused to pierce :1 hole through the glass at the thin (renter, Whilo still in its; nioiten state after which the end of tho wire is immediately withd :iwn therefrom,

tiiinee some nieclnn' in for tf 'l'ippilll. teedingr, roloasinp; and rep ulnting the ponition his rire in the muehine iressential to tho iurentioin IHGiiiHHiQiH tor zu'roinplinhiup; il lri will now he der eriliied.

iihe-wire li hrouo ht down through the "tt'tttjl. ot the pipe 1th (in the ilJl'Qtltitu it) oi the lower ohd oi this pipo the Piltllflftfl. ii is screwed. 'lhis pipe extends; vertirolly through the orifice: horned lheretor in tho pluteg i and whirh guide it in its? vertical nuireinent.

llnnthlever ttifi l'itllliiQCiQt i to the vertical eohnnn i hy e pirot and 1 rorided with u nlot 'tEh whieh reeeiren the pin it on the will; r hi. \Vllit'il hitter i lidnhlr mounted around the pipe '10 end the raising and lowering); oi this lever ii in thr operator rontrols; the entire lllfitittlltiflit oi' the 11121- rhine namely the molding (Iii the article and the piercing: oi the hole through it? renter zit pr iiperlr timed interrulvi.

header t holted securely to the up per end oi n sdide '18 h inennn oi n nut iii owed down upon the ihrondod upper end tit) ot the slide 18' rt pnir o'l guide-rods 21 ure holted rigz idlj to the hender ii h v outta Roi-owed on the threads whore and below the header. and these guich'a-rods extend thron 'h the holer: torn'ind therefor in tho plate und 5, throingh whirh they hare n rdiding uioroinrnt. Thane gruido- 'on 1 ohm extend through the collnr i to whirh they nro secured. Th0 stilt in irnl spring: is fileored upon thin siide i8 helween the h nider and the upper end of tho plunger pipe exerting}; downward presnnre upon the latter.

\Vhile the iilungertl 21nd plunger pipe 10 hnvo approttiinntely 2i noren (7) inch ut olce with the :nisinn' and h'iwering oi? the hand-lever 'iTl the slide flti has 21pplffiqililfittly 1 onelnil't ttt inch inoreinent within the ripe 10.

The pipo l0 and slido it? are out :rwny on o niosite hides; noniewhere neur the center to tiorn'i the slots and 224-. irespei'ttzirel y the upper rind lower endti 0t which niots; torn: ntopi-i 2h und E35. Plates fZti enteni l trans;- rerseiy through these slots :ind :ne secured her by ineznns ot winged spurring holtn ('0 l 9) thus forming); it ero head G.

Thh rehitire width of these phi i the nlois iZ-l :ind EZ-i in the pipe 1.0 nnd slide 18 define the rehttire n'nirenient hetween the slide and tho pipe 10, on the purpose of this inoroiuent ii") to allow for grinding the wire, "Feeding it downvnrd to cause the end to pierce the hole in the gloss (on and to withdraw the wire into the plunger litter the hole shut have horn pierced. and utter words role: re the wire to gauge its length preliminary to the next oporntion.

In the slide 18, a slot 528 is formed, and within this Shit there are two wire gripping jaws, namely the lined jaw and the inoruhle jnw Lit) between which the wire WV extends. 5

The inorz'ihle jaw has an inclined renr iuirtnee 31. A rocleshn'lt 5353 lSlIlOHillittl to turn in the platen 9.36. This roeleshnlt has :1 item iti thereon in position to onp'ugo the inelined reiir nurture 3t oi' the gripping "inw Z50.

{this gripping notion in :mtonmticully eontroiled h any nip iro'rod niovlmnisnn, :lor orr :unpio an eccentric 3t i5 loosely mounted on tho roch-nhutla iii, unil has it limited n'iorenient thereon as deiined hy the segmental, slot (non .l ign. l, 2.), 5i and ti). A screw 1 254; extends thrijingh this segmental slot 35 into tho rock-shalt $32, and :i lniir-sspring iii in vonnerted to the screw Pit? and to one side or the eerontrie I i-l and is oi suiiioiont strength to restore the eoren'trie to its normal position on the roelonhnt't. The roelonhn'l t itself is held under tension by :1 still spiral spring filth one end o l which is secured to tho rrelvshnit. and the other at mine eonvenientr wire Vi to more with the slide and plnnsg er pipe when the two are moving together dnr- 111;; the manor portion of the stroke of the nieohine and when in this position the noun 35) in the pnth oi n11 Lawlnrpod trip i dopending troni the upper plate oi. the fr-nine, upon stir-firing); which townrd the end of the upper Si'IOltQ ol the nnu'liine the shaft 32 root-:ed. to the r 11i, in; irnliented hy the dotted lines in Iiiigg. i and the full lines in liig". 5, thereby swinging; the run] 33 away troni the sloping nurture 31 on the hook oi the) inn 3t). 'llhiu leurrs the wire tree, which theroi'ipon drops-a by gravity :1 very short distunee through the machine, until it FliZt'ihItE-i n atop it provided tor the [)IUJIJOSO. This provision in nnide to roniponnnte nntornoti will for wear and exhaustion otthe piercing pin at the lower end or" the wire W, due to the intenue heat of the molten gloss, even though the pit-roiling; is through u very thin iihn ol' gluon :1 t the renter oi the mp and hut inoniei'itnry.

The stop ll secured on t'he lower end of :1 Spindle 4-9. whiehiu suspended from mid through :1 hoie -13 in the header IT as shown in iiigr. l nnd '10, and is slidnhle thrmlgh holes 44 and 15' in the plates 4 and 5, respecti\*ely,-otthe frame. The spindle 42 has a finger 46 extending radially therefrom, and this is held in contact with the cam rod 17, which is set at an angle of perhaps 4-5 by the tension ot a spring 48 extending from a stud 19 on the upper end of the spindle to some part of the header, which has the etfect of imparting a quarter turn? to the spindle with each upward or downward stroke of the plunger.

'lhis quarter turn. brings the stop 41 from the position. shown in" Fig. 8- 'in full lines to the position indicated in dotted lines therein onthe upward stroke, thus bringing the stop all iln lnediately under the wire by a gradual turn ot' the spindle 42-, which position it reaches prior tocthe end of the upstroke of the machine, and. in'nnediately preceding the contact of the nose 39 on the eccentric strilting the trip 40. The striking of the trip causes the instant release of the wire, whereupon the latter drops a fraction ot an inchuntil caught by the stop 41 therebeneath; This mechamsm msuresa proper elevation of the wire or piercing-pin 1V preceding each operation of piercing a hole. v

. \Vith the turtherupward nnweinent of the cross-head C, the nose 39 of the eccentric clears the trip, asit is about. to do in Fig. 5.

The spring 38 rocks the shaft 32 back to the prior to the end of the upstroke ot the movmg parts of the macl' ine, nevertheless this re-grippmg does not occur until, the crosshead C has reached the set-screws 51., and its arrested, while the slide 18 and plunger pipe 10 continue on upward. with the "further litiing of the lever 11, the Spring being compressed thereby, by the shortening of the space-between the cross-head Gand the hub ot the collar 15.

Thehand-lever 11, with its connected parts, have now reached the limit ot' their u iward movement. This action permits the grippingmechanism to' take a lower hold upon the wire.

With the downward movement oi": the

hand-lever 11,.on reversing the motion of the machine, that is to say by lowering the hand-lever 11. the slide 18 and plunger pipe parts shown in- Fig. 1,

continues until the hand-lever has reached been molded, whereupon the further downward movementio t the hand-lever 'trom this point to the end of'its.downstrokecauses the slide; 18 to more downward through the plunger pipe 10, which latter has been arrested by the molten glass which the plunger is fashioning inthe mold. This causes the upper shoulder 25 of the slide 18 to press downwardly against the cross-head C against the expansive action of thespring 52,.and to cause the lower end of lllQfWVllO W to pierce a hole through the thin center of the cap. This movement of the wire through the plunger 9 and plunger pipe 10 is defined by the width of the slots. A in the side of the pipe 10.v

@n lifting the hand-lever 11,. the slide 18 is raised, and with it the cross-head C with:

the wire Vi", which. cross-head moves from.

the bottom of the slot 2% to the top, thereby striking the upper shoulder 25, the stilt spiral spring 52 holding the plunger pipelO, plunger 9 and the wire W all in thepositionwhich viewed in Fig. 1 of the drawings.

end of the wire Wis concealed and protected from the ntense heat ot the molten material 'which has spent its intensest heat between the brief period that intervenes between the molding and the hole piercing operation, the wire ren'laining concealed and protected withinthe plunger except as it is momentarily projected, after which it is returned to the position shown'in Figs. 1 and l.

A blast of air is supplied to the chamber D of the plunger through air pipe 55 to assist in cooling the piercing end of the wire. 7 The further operation otthe machine is merely a repetition of the cycle of motions that have been described.

In this way, the wear and consumption ot the wire is very slight, and it is always held g ,in uniform position; in other words, it is v:turther upwardmovement has thereby been automatically re-adjusted with each. complete. cycle or -up and down stroke ot'the machine. Too much emphasis cannot be placed. upon the concealment and protection provided for the piercing-pin, att'orded by the plunger, within winch it rests, durlng the formation of the molded article, preparatory to its pro-.

hron'i the foregoing, it will be seen that the jectionhtrom its hiding-place through the moldedarticle to form the hole and its-immediate withdrawal there'trom back into the plunger.

' lt should be understood that in molding glass where hollow ware is be ng manufactuied, the molten mass is always pierced ranges fromabout' one-fourth of an inch in diameter, in ward. But the art ot' using a minute pinto puncture glass-in the proc ess of making has'failed in all the many attempts" heretofore ns de in this direction, from a successful manufacturing stand.

poiiit, and h'as generally been abandoned because the intense heat of molten glass pin concealed and protected within the hole in the plunger during the molding of the plastic materi al, and which thereafter causes a projection of the pin to pierce a hole through the molded article and its withdrawalthereafterinto the hole in the plunger.

14. The con'ibination with a frame, a mold and plunger and plunger pi pe, of a gri-poing mechanism, a wire extending through the pipe and gripping mechanism and to the plunger, and means for automatically releasing the wire, means for catching the wire and supporting it when released, and means for automatically rc-gripping the wire, the

plunger, a plunger-pipe slidably connected with the frame, and to which the plunger is connected, of a piercing-pin in the form of a wire extending through the pipe, means for automaticallygripping and releasing the wire and for moving it endwise within the pipe and plunger, and means for discharging a cooling medium into the plunger for cooling the piercing end of the wire.

, 17. The combination of a frame, a pipe slidably connected therewith, a plunger attached to the pipe, a wire, gripping mechanism movably connected with the pipe and in position normally to grip the wire, means for automatically releasing the grip upon the wire when the pipe and plunger are moved to a predetermined point, means for catching and supporting the wire and regulating its descent within the pipe and plunger, and means for causing an automatic re grip upon the wire. V

18. The combination of a frame, a pipe slidably connected therewith, a plunger carried by the pipe, a collar loosely and slidably mounted upon the pipe, a slide movable within the pipe, wire gripping mechanism conected with the slide, a wire extending through the pipe, slide and gripping mechanism, means for causing the gripping mechanism automatically to engage the wire, meansfor automatically releasing the gripping mechanism, means for catching and supporting the wire when released, and means for causing an automatic re-grip upon the wire when the parts have moved to a predetermined position.

. 19. The combination of a frame, a pipe slidably connected therewith, a plunger carried by the pipe, a slide extending into the pipe, a wire extending through the slide and pipe, gripplng mechanism carried by the slide for automatically engaging and I l v I I v i I releasing the wire at predetermined Interyals, meansfor' engaging and causing the nected with the slide, rods extending from the collar to the header, and a hand-lever pivotally connected with the frame and having sliding pivotal connection with the colla'r for lllOViRgtiiQ pipe, plunger and slide, I 20. The combination of a frame, a pipe slid-ably connected therewith, a pl nger carried by the pipe, a slide extending into the pipe, a wire extending through the slide and pipe, gripping mechanism carried by theslide for automaticaliy engaging and releasing the wire at predetermined intervals,

means forengaging and causing the release ofthe gripping mechanism, a collar slida--- ably mounted on the pipe, a header connected with the slide, rods extending from the collar to the header, a hand-lever pivotally connected with the frame and having slidably connected therewith and carrying a plunger, a wire extending through the pipe, a slide extending into the pipe, a cross-head connected therewith, and gripping means carriedby the cross-head for automatically gripping and releasing the wire.

22.. The combination of a, frame, a pipe slidably connected therewith and carrying a plunger, a wire extending through the pipe, a slide'extending into the pipe, acrosshead connected therewith, gripping means carried by the cross-head for auton'iatically gripping and releasing the wire, a trip for releasing the gripping mechanism, and adjustablestops in the path of the cross-head for limiting its movement in one direction.

The combination of a frame, a pipe slidably connected therewith and carrying a plunger, a wire extending through the pipe, a slide extending into the pipe, a cross-head connected therewith, gripping means carried by the cross-head for automatically gripping and releasing the wire, a header connected ,withtheslide, a spindle slidably connected with the frame and rotatably connected with the header, a stop carried by the spindle, means for moving the pipe, slide and spindle endwise, and means for imparting an axial turn'tothe spindle as it moves endwise, whereby to turn the stop into a position beneath the wire to catch and support the latter when released by the gripping mechanism.

24. The combinat on of a mold having a till) 110101 iIhCl'GilL u plunger having :m air chamber i'lieruiu, and :1 hole i'illfiligil its center. a plunger pipe. zi wire, means for forcing ('13? wire through the hole in the iuniii. and with] 'uu'iug it into the plunger, and. menus fur eonriuei'iugx u enniiugr medium in euuiuei \viih Hie end of the wire in the. plunger.

25. The euiiubimll'iuu 0i :1 frame. u pipe, :1 plunger eurried by the pipe. a slide i1 ui\'- ubie in the plunger, :1 eruss hezui -1i iui11y eonueeieii with H10 pipe in position to be moved by The siide iu une ilireet'iuu. and m nus 1 0' ueluuting the slide and pipe but i (ugeihe' and iiuiepeiuieuiiy u'i' ueh uiher u iimiieil and pre-(ieieriuineii (iistuuee.

Q6. The eun'ibiiuiiiou (if u 'irzuue. u pipev a plunger carried by Hie p pe, :1 isiide uuwv able in (he piuuger, u uruss'i'ieud :siidubly euuueeied with he pipe in pusiiiou in he mover by 1110 slide in one direction. menus fur zu'luul'iug the slide uni! pipe both to gether :uui, imie iemieiu'ly mi rueh uiher limited and prei ieiei'iuiueii distance, :1 wire exteiuiiiig ilu'ougii the pipe, slide lllfli erossiieud, gripping means 1': i'l'iUKi by the ems.- 11ml for manually gripping Hui Wire menus for trip jiiug the grip ulu'uluuiicuiiy to re: lease (he wire. meu'us fur euteliiug mui Elli)- purting Hie wire when reieuw'eii uuriuieuus or musing: (he gripping mechanism (0 take a lower grip upon the Wire (in li)-l:l'il)])il1.l'.

In testimony whereof I ilii'iii my HifJ'HHiLHI'O.

ANDREW U. T YSON, 

